US7905886B1 - System and methods for performing transforaminal lumbar interbody fusion - Google Patents
System and methods for performing transforaminal lumbar interbody fusion Download PDFInfo
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- US7905886B1 US7905886B1 US10/887,542 US88754204A US7905886B1 US 7905886 B1 US7905886 B1 US 7905886B1 US 88754204 A US88754204 A US 88754204A US 7905886 B1 US7905886 B1 US 7905886B1
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Definitions
- This invention relates generally to spinal surgery and, more particularly, to intervertebral implant insertion devices, implants, and methods for performing transforaminal lumbar interbody fusion (TLIF).
- TLIF transforaminal lumbar interbody fusion
- ALIF anterior lumbar interbody fusion
- PLIF posterior lumbar interbody fusion
- TLIF transforaminal lumbar interbody fusion
- the present invention is directed at a system and methods for performing transforaminal lumbar interbody fusion.
- the system of the present invention may include any number of devices for performing transforaminal lumbar interbody fusion, including but not limited to a variety of TLIF implants, implant inserters for inserting the TLIF implants into the intervertebral space, positioning devices for positioning the TLIF implants after insertion, and packing devices for packing additional materials within the disc space to promote fusion.
- Optional preparation devices may also be provided for preparing the intervertebral space prior to implant insertion.
- access must first be gained to the disc space between vertebrae of interest.
- this may be accomplished from a generally posterior approach to the patient's spine via a unilateral opening in the annulus of the intervertebral disc of interest. This may be accomplished in a traditional “open” manner (via a large incision) or, according to a preferred embodiment, in a minimally invasive fashion using a retractor or similar minimally invasive instrument, such as a cannula.
- the disc space must be prepared by removing nucleus pulposus material and optionally decorticating the endplates. The clinician may then distract the vertebrae to expand the disc space to a desired height.
- the clinician may then select a suitably dimensioned implant.
- the implant is then placed between two prongs located on the distal end of an implant inserter of the present invention.
- the prongs are then compressed by rotating a locking sleeve via a grip to securely engage the implant.
- the clinician may insert the implant into the disc space by passing the inserter through the operative corridor of the access system (e.g. minimal access retractor).
- the clinician may take several fluoroscopic pictures to determine the location of the implant within the disc space by observing the location of the distal end of the inserter, and in particular the set of prongs.
- the distal end of the implant inserter may be angled to facilitate insertion of the implant into disc space.
- the implant inserter may be generally straight and used to insert the implant into disc space before being rotating the implant 90-degrees to engage the endplates.
- the clinician may release the implant by rotating the sleeve via the grip counter-clockwise to decompress the set of prongs.
- a straight tamp may be used to guide the implant to the desired position.
- a footed tamp may be used to insert and compress autograft or other fusion-promoting composition (such as bone morphogenic protein) in the disc space.
- the clinician may then remove any distraction devices prior to the removal of the inserter so the vertebral endplates of the vertebrae engage with teeth provided on the top and bottom of the implant. Thereafter, the inserter may be withdrawn, the annulotomy closed, the access system removed, and the incision closed.
- FIGS. 1-3 are perspective cut-away views of an exemplary process of inserting an exemplary implant using an exemplary inserter in accordance with the present invention
- FIGS. 4A and 4B are perspective and top views, respectively, of an exemplary implant and inserter according to one embodiment of the present invention illustrating the positioning of the implant just after release from the inserter;
- FIGS. 5A and 5B are top views of an exemplary implant and straight tamp in use according to one embodiment of the present invention.
- FIG. 5C is a top view of an exemplary implant and footed tamp according to one embodiment of the present invention.
- FIG. 6A is a top view of an exemplary scraper according to one embodiment of the present invention.
- FIG. 6B is a top view of an exemplary rasp according to one embodiment of the present invention.
- FIG. 6C is a top view of an exemplary straight tamp according to one embodiment of the present invention.
- FIG. 6D is a top view of an exemplary footed tamp according to one embodiment of the present invention.
- FIG. 7A is a perspective right side isometric view of an exemplary implant according to one embodiment of the present invention having the dimensions of 8 mm tall, 9 mm wide, and 20 mm long;
- FIG. 7B is a perspective left side isometric view of the exemplary implant of FIG. 7A ;
- FIG. 7C is a top view of the exemplary implant of FIG. 7A ;
- FIG. 7D is a tool base engaging side view of the exemplary implant of FIG. 7A ;
- FIG. 7E is an exploded view of a plurality of teeth located on the exemplary implant of FIG. 7A ;
- FIG. 7F is a right side view of the exemplary implant of FIG. 7A ;
- FIGS. 8A and 8B are perspective right and left side isometric views, respectively, of an exemplary implant according to one embodiment of the present invention having the dimensions of 8 mm tall, 11 mm wide, and 20 mm long;
- FIG. 8C is a top view of the exemplary implant of FIG. 8A ;
- FIG. 8D is a tool base engaging side view of the exemplary implant of FIG. 8A ;
- FIGS. 9A and 9B are perspective right and left side isometric views, respectively, of an exemplary implant according to one embodiment of the present invention having the dimensions of 8 mm tall, 9 mm wide, and 25 mm long;
- FIG. 9C is a top view of the exemplary implant of FIG. 9A ;
- FIG. 9D is a tool base engaging side view of the exemplary implant of FIG. 9A ;
- FIG. 9E is an exploded view of a plurality of teeth located on the exemplary implant of FIG. 9A ;
- FIG. 9F is a right side view of the exemplary implant of FIG. 9A ;
- FIGS. 10A and 10B are perspective right and left side isometric views, respectively, of an exemplary implant according to one embodiment of the present invention having the dimensions of 8 mm tall, 11 mm wide, and 25 mm long;
- FIG. 10C is a top isometric view of the exemplary implant of FIG. 10A ;
- FIG. 10D is a tool base engaging side view of the exemplary implant of FIG. 10A ;
- FIG. 11 is an exploded view of an exemplary 11 mm wide angled inserter according to one embodiment of the present invention, illustrating in particular the fork and collar components;
- FIG. 12A is a top view of an exemplary 9 mm wide angled inserter according to one embodiment of the present invention.
- FIG. 12B is a top view of an exemplary 11 mm wide angled inserter according to one embodiment of the present invention.
- FIG. 12C is a side view of the exemplary 9 mm wide angled inserter of FIG. 12A ;
- FIG. 13A is a top view of an exemplary fork component according to one embodiment of the present invention.
- FIG. 13B is a side view of an exemplary angled implant insertion tool distal end according to one embodiment of the present invention.
- FIG. 13C is a top view of the angled implant insertion tool distal end of FIG. 13B ;
- FIG. 13D is a front view of the angled implant insertion tool distal end of FIG. 13B ;
- FIG. 13E is a side view of an exemplary implant insertion tool proximal end according to one embodiment of the present invention.
- FIG. 14 is an exploded view of an exemplary 11 mm wide straight implant insertion tool according to one embodiment of the present invention, illustrating in particular the fork and collar components;
- FIG. 15A is a top view of a fully assembled exemplary 11 mm wide straight implant insertion tool according to one embodiment of the present invention.
- FIG. 15B is a side view diagram of an exemplary 11 mm wide straight implant insertion tool in accordance with one embodiment of the present invention.
- FIG. 16A is a side view diagram of an exemplary 11 mm wide straight implant insertion tool fork in accordance with one embodiment of the present invention.
- FIG. 16B is a top view diagram of an exemplary 11 mm wide straight implant insertion tool fork in accordance with one embodiment of the present invention.
- FIG. 16C is a detailed top view diagram of an exemplary 11 mm wide straight implant insertion tool fork distal end in accordance with the present invention.
- FIG. 16D is a detailed side view diagram of an exemplary 11 mm wide straight implant insertion tool fork distal end in accordance with the present invention.
- FIG. 16E is a detailed side view diagram of an exemplary 11 mm wide implant insertion tool fork proximal end in accordance with one embodiment of the present invention.
- FIG. 16F is a detailed end view diagram of an exemplary 11 mm wide implant insertion tool fork distal end in accordance with one embodiment of the present invention.
- FIG. 17 is an isometric line diagram view of an exemplary 11 mm wide straight implant insertion tool distal end gripping an exemplary 11 mm wide, 20 mm long implant in accordance with one embodiment of the present invention
- FIG. 18 is an isometric line diagram of an exemplary 9 mm wide straight implant insertion tool distal end gripping an exemplary 9 mm wide, 20 mm long implant in accordance with one embodiment of the present invention
- FIG. 19 is an isometric line diagram of an exemplary 9 mm wide implant insertion tool distal end gripping an exemplary 9 mm wide, 25 mm long implant in accordance with one embodiment of the present invention
- FIG. 20 is an isometric line diagram of an exemplary 11 mm wide implant insertion tool distal end gripping an exemplary 11 mm wide, 25 mm long implant in accordance with one embodiment of the present invention
- FIG. 21A is a cross-sectional view of an in vivo spinal surgical procedure according to one embodiment of the present invention, illustrating in particular the use of a disc cutter to clear disc material from intradiscal space;
- FIG. 21B is a cross-sectional view of an in vivo spinal surgical procedure according to one embodiment of the present invention, illustrating in particular the use of a curette to clear disc material from intradiscal space;
- FIG. 21C is a cross-sectional view of an in vivo spinal surgical procedure according to one embodiment of the present invention, illustrating in particular the use of a scraper to clear disc material from intradiscal space;
- FIG. 21D is a cross-sectional view of an in vivo spinal surgical procedure according to one embodiment of the present invention, illustrating in particular the use of a disc brush to clear disc material from intradiscal space;
- FIG. 21E is a cross-sectional view of an in vivo spinal surgical procedure according to one embodiment of the present invention, illustrating in particular the use of a rasp to clear disc material from intradiscal space;
- FIGS. 22A-22B are cross-sectional views of an in vivo spinal surgical procedure according to one embodiment of the present invention, illustrating in particular the insertion of an implant into the disc space using an angled inserter;
- FIGS. 23A-23B are cross-sectional views of an in vivo spinal surgical procedure according to one embodiment of the present invention, illustrating in particular the insertion of an implant into the disc space using a straight inserter;
- FIG. 24 is a cross-sectional view of an in vivo spinal surgical procedure according to one embodiment of the present invention, illustrating in particular the positioning of an implant within the disc space using a straight tamp;
- FIG. 25 is a cross-sectional view of an in vivo spinal surgical procedure according to one embodiment of the present invention, illustrating in particular the addition and compaction of graft material within the disc space using a footed tamp;
- FIG. 26 is a cross-sectional view of an in vivo spinal surgical procedure according to one embodiment of the present invention, illustrating in particular the final positioning of an implant within the disc space after conclusion of the procedure.
- the present invention may include a variety of devices for performing transforaminal lumbar interbody fusion, including but not limited to a variety of TLIF implants, implant inserters for inserting the TLIF implants into the intervertebral space, positioning devices for positioning the TLIF implants after insertion, and packing devices for packing additional materials within the disc space to promote fusion.
- Optional preparation devices may also be provided for preparing the intervertebral space prior to implant insertion. These devices will be described in detail below.
- FIGS. 1-3 depict a cut-away view of an exemplary process of inserting an exemplary implant 200 using an exemplary inserter 100 in accordance with the present invention.
- an exemplary implant 200 (shown in sectional view) is inserted via an inserter 100 into the disc space 12 of vertebrae 10 , 20 .
- Upper vertebra 20 is shown in wire line view to more clearly show the advancement of the implant 200 and inserter from FIG. 1 to FIG. 3 into the disc space 12 .
- the inserter 100 grips the implant 200 via a set of prongs 132 , 134 .
- the prongs 132 , 134 are fluoroscopically opaque. Accordingly, as the implant 200 is advanced from a position outside the disc space 12 (as shown in FIG.
- the inserter 100 and method of the present invention may be used to accurately place an implant 200 within a disc space 12 regardless of the fluoroscopic properties of the implant (fluoroscopically opaque or transparent).
- FIGS. 4A-6D illustrate an exemplary process of positioning implant 200 into a desired location according to one embodiment of the present invention.
- the implant 200 is released from the inserter 100 as described in further detail below.
- a straight tamp 420 may be used to guide implant 200 to a desired position.
- a clinician may add and pack in autograft or other fusion-assisting composition (such as bone morphogenic protein) using a footed tamp 430 , as shown in FIG. 5C .
- FIGS. 6A-6D illustrate a variety of instruments that may be used according to the present invention.
- FIG. 6A depicts a scraper 410 that may be used to clean out a disc space 12 prior to insertion of implant 200 .
- FIG. 6B is a line drawing of an exemplary rasp 420 according to the present invention, used to further clean out the disc space 12 prior to insertion of implant 200 .
- FIG. 6C is a line drawing of an exemplary straight tamp 430 according to one embodiment of the present invention, used to guide implant 200 into position after insertion into disc space 12 .
- FIG. 6D is a line drawing of a footed tamp 440 according to the present invention, that may be used to insert and compress allograft material into the disc space 12 once implant 200 has been inserted and positioned.
- the implant 200 of the present invention may be provided in any number of suitable shapes and sizes. In a preferred embodiment, however, the implant 200 may comprise the exemplary shapes and size ranges as shown and detailed in FIGS. 7A-10D .
- the exemplary implant 200 may have a width of 9 or 11 millimeters and a length of 20 or 25 millimeters. Further, as shown in Size Tables 1 - 4 , the exemplary implant 200 may have a height from 6 to 16 millimeters in 2 mm increments in one exemplary embodiment.
- the basic geometry of exemplary implant 200 is similar for each of these size variations.
- the implant 200 is crescent shaped with a top 210 , bottom 220 , proximal end 230 , distal end 260 , left side 240 , and right side 250 .
- the top 210 and bottom 220 include a plurality of rows of teeth 212 where the teeth are designed to engage vertebra endplates upon insertion between vertebrae.
- the implant sides 230 , 240 , 250 , 260 may include a plurality of tool engaging recesses 232 , 234 , 236 , and 242 .
- the left side 240 of implant 200 is curved while the tool recess 242 is straight.
- the right side 250 has a curved section 252 and flat sections corresponding to the tool engaging recesses 234 , 236 .
- the proximal end 230 of implant 200 has a flat end and the tool engaging recess 232 also has a flat end with a pair of 45-degree offsets that mate with the tool recesses 234 , 242
- FIG. 7A is a top, right side perspective view isometric line drawing of an exemplary implant 200 having dimensions of 8 mm tall, 9 mm wide, and 20 mm long.
- FIG. 7B is a bottom, left side perspective view isometric line drawing of the exemplary implant 200 of FIG. 7A .
- FIGS. 7C and 7D are top view and proximal end view line drawings, respectively, of the exemplary 8 mm tall, 9 mm wide, 20 mm long implant 200 .
- FIG. 7E is a detailed view line drawing of several teeth 212 for an exemplary 8 mm tall, 20 mm long implant 200 .
- each tooth has a top 216 and side 218 wherein the top has a 60-degree inclination relative to the flat surface of the implant top 210 or bottom 220 .
- the exemplary 20 mm long implant 200 has 22 such teeth 212 .
- FIG. 7F is a right side view line drawing of the implant 200 of FIG. 7A illustrating the general shape of two 45-degree teeth 222 disposed on the proximal end 230 .
- FIG. 8A is a top, right side isometric line drawing of an exemplary implant 204 having dimensions of 8 mm tall, 11 mm wide, and 20 mm long.
- FIG. 8B is a bottom, left side isometric line drawing of the exemplary 8 mm tall, 11 mm wide, 20 mm long implant 204 .
- FIG. 8C is a top view line drawing of the exemplary 8 mm tall, 11 mm wide, 20 mm long implant 204 .
- FIG. 8D is a proximal end view line drawing of the exemplary 8 mm tall, 11 mm wide, 20 mm long implant 204 .
- FIG. 9A is a top, right side isometric line drawing of an exemplary implant 202 having dimensions of 8 mm tall, 9 mm wide, and 25 mm long.
- FIG. 9B is a bottom, left side isometric line drawing of the exemplary 8 mm tall, 9 mm wide, 25 mm long implant 202 .
- FIG. 9C is a top view line drawing of the exemplary 8 mm tall, 9 mm wide, 25 mm long implant 202 .
- FIG. 9D is a proximal end view line drawing of the exemplary 8 mm tall, 9 mm wide, 25 mm long implant 202 .
- FIG. 9E is a detailed view line drawing of several teeth 212 for an exemplary 25 mm long implant 202 .
- each tooth has a top 216 and side 218 where the top has a 60-degree inclination relative to the flat surface of the implant top 210 or bottom 220 .
- the exemplary 25 mm long implant 200 has 28 such teeth 212 .
- FIG. 9F is a right side view line drawing of an exemplary 8 mm tall, 25 mm long implant 202 that indicates the dimensions of the two 45-degree teeth 222 .
- FIG. 10A is a top, right side isometric line drawing of an exemplary implant 206 having dimensions of 8 mm tall, 11 mm wide, and 25 mm long.
- FIG. 10B is a bottom, left side isometric line drawing of the exemplary 8 mm tall, 11 mm wide, 25 mm long implant 206 .
- FIG. 10C is a top view line drawing of the exemplary 8 mm tall, 11 mm wide, 25 mm long implant 206 .
- FIG. 10D is a proximal end view line drawing of the exemplary 8 mm tall, 11 mm wide, 25 mm long implant 206 of FIGS. 10A-10C .
- FIGS. 11-16F are views of different configurations of the exemplary inserter 100 in accordance with the present invention.
- FIG. 11 is an isometric line drawing of the 11 mm wide angled implant inserter 100 in its two parts: the collar 110 and fork 120 .
- the fork 120 includes a shaft 122 , a proximal tool-engaging end 126 and a distal implant gripping end 124 .
- the proximal tool-engaging end 126 includes a set of external threads 115 .
- the distal implant gripping end 124 includes a set of prongs 132 , 134 for interaction with the implant 200 .
- the collar 110 includes a hollow sleeve 112 dimensioned to slide over the proximal end 126 of the fork 120 and engage the distal end 124 .
- the collar 110 includes a grip 114 with internal receiving threads 128 therein where the internal receiving threads 128 engage the external threads 115 of fork 120 when the sleeve 112 is slid over the proximal end 126 of fork and 120 approaches the distal end 124 .
- the grip 114 is rotated clockwise to further advance the distal end of collar 110 .
- the distal end 124 of fork 120 is dimensioned so that the collar 110 will compress the set of prongs 132 , 134 upon advancement of the distal end of collar 110 by clockwise rotation of the sleeve 112 via the grip 114 .
- the prongs 132 , 134 may be advanced toward each other to securely engage the implant 200 upon clockwise rotation of the grip 114 .
- the implant 200 may be similarly released from the prongs 132 , 134 by rotating the sleeve 112 counterclockwise when desired, such as when the implant is positioned in a desired location between vertebrae 10 and 20 as shown in FIG. 4 .
- FIGS. 12A & 12B are top views of line drawings of the 9 mm and 11 mm, respectively, of angled implant inserters 100
- FIG. 12C is a side view of the line drawing of the 9 mm wide angled implant inserter 100
- the inserter 100 is shown with a length of about 10 inches from the distal end 124 to the grip 114 .
- inserter 100 may be of any length desirable to insert the implant 200 into the desired location. This enables a clinician to use the inserter 100 to place an implant 200 between vertebrae in a minimally invasive procedure, such as via the use of a multi-blade retractor as described below.
- FIGS. 13A-13E are line drawings of the exemplary 11 mm wide implant fork 120 .
- FIG. 13A is a top view line drawing of one embodiment of the fork 120 , illustrating in particular the angled nature of prongs 132 , 134 . This angled relationship of prongs 132 , 134 enables an implant 200 to be slightly angled with respect to vertebrae 10 , 20 in turn allowing for a steeper (i.e. more vertical) angle of entry into the spinal column by the clinician.
- FIG. 13B is a top view line drawing of the distal end 124 of fork 120
- FIG. 13C is a side view line drawing of the distal end 124 of fork 120
- FIG. 13D is an end view line drawing of the distal end 124 of fork 120 .
- the distal end 124 includes a set of prongs 132 , 134 and a compressible section 136 .
- the first prong 132 may be compressed toward the second prong 134 up to a distance of about 0.40 inches.
- FIG. 13E is a side view line drawing of the tool engaging proximal end 126 of fork 120 .
- the tool engaging proximal end 126 includes a formation 127 to allow coupling to a handle (not shown).
- FIGS. 14-16F are line drawings of an exemplary embodiment of an 11 mm wide straight implant inserter 300 in accordance with the present invention.
- FIG. 14 is an isometric line drawing of the 11 mm wide straight inserter in its two parts: the collar 310 and fork 320 .
- FIG. 15A is a top view line drawing of the 11 mm wide implant inserter 300 and
- FIG. 15B is a side view of the line drawing of the 11 mm wide implant inserter 300 .
- FIGS. 16A-16F are line drawings of the exemplary 11 mm wide implant fork 320 .
- FIG. 16A is a side view line drawing of the fork 320 that, in one embodiment, has an overall length of about 12.40 inches and a distal end 324 length of about 1.035 inches.
- FIG. 16B is a top view line drawing of the fork 320
- FIG. 16C is a top view line drawing of the distal end 324 of fork 320
- FIG. 16D is a side view line drawing of the distal end 324 of fork 320
- FIG. 16F is an end view line drawing of the distal end 324 of fork 320
- FIG. 16E is a side view line drawing of the tool engaging proximal end 326 of the fork 320 .
- FIGS. 17-20 are diagrams of the exemplary 9 and 11 mm wide implant inserter 100 gripping one of the 20 mm and 25 mm long implants 200 .
- FIG. 17 is an isometric line drawing of an exemplary 11 mm wide implant inserter 100 gripping an exemplary 20 mm long implant 200 . As shown in these figures, the first prong 132 extends beyond implant end 260 .
- FIG. 18 is an isometric line drawing of an exemplary 9 mm wide implant inserter 100 gripping an exemplary 20 mm long implant 200 .
- FIG. 19 is an isometric line drawing of an exemplary 9 mm wide implant inserter 100 gripping an exemplary 25 mm long implant 200 . As shown in these figures, the implant end 260 extends slightly beyond the first prong 132 .
- FIG. 20 is an isometric line drawing of an exemplary 11 mm wide implant inserter 100 gripping an exemplary 25 mm long implant 200 .
- the various devices described above may be provided with color-coding to facilitate ease-of-use for the surgeon. More specifically, all instruments and implants of a particular size may be provided with specific graphical and/or colored indicia such that the surgeon will know, simply by referring to the colored indicia, which instrument or implant he or she should employ from among the tray of instruments containing the instruments of the present invention.
- the 8 mm height implants and instruments may be designated with a red color
- the 10 mm height implants and instruments may be provided with a green color
- the 12 mm height implants and instruments may be provided with a gold or yellow color
- the 14 mm height implants and instruments may be provided with a blue color.
- the articles suitable for color-coding according to this feature of the present invention include, but are not necessarily limited to, devices for sizing the disc space to determine what size implant should be inserted, the implant packaging, broaches, and implant inserters.
- FIGS. 21-26 illustrate in greater detail a preferred embodiment of the fusion procedure according to the present invention.
- an incision may be made on the patient's skin at location postero-lateral to the desired implant location.
- a trocar or other instrument may be advanced to the annulus of the disc between the vertebrae 10 , 20 of interest.
- a cannula or similar device may then be advanced over the trocar to engage the disc annulus.
- a clinician may prefer to use a surgical retractor 400 to create an operating corridor 402 through which to insert the implant 200 .
- a clinician may perform an annulotomy to remove a section of the annulus and a discectomy thereafter to remove a portion of the disc where the implant 200 is to be placed. Further, the clinician may partially decorticate the endplates of the vertebrae 10 , 20 .
- FIGS. 21A-21E illustrate an exemplary set of steps that may be taken to clean out the disc space 12 prior to insertion of implant 200 .
- FIG. 21A depicts the use of a disc cutter 406 to remove disc material. To accomplish this, disc cutter 406 is employed with a rotating motion, and disc material is cut and loosened from the endplates of vertebrae 10 , 20 . Cut or loosened disc material is removed by removing the disc utter 406 .
- FIG. 21B illustrates the use of a curette 408 to further remove excess disc material and cartilage from the disc space 12 .
- FIG. 21C depicts the use of a scraper 410 to further remove disc material and cartilage from the endplates of vertebrae 10 , 20 .
- FIG. 21D shows the use of a disc brush 412 to still further remove excess disc material.
- FIG. 21E illustrates the use of a rasp 420 in an optional final step in preparing the endplates.
- the clinician may distract vertebrae 10 , 20 to expand the disc space to a desired height. Based on the distraction height and the size of the vertebrae 10 , 20 , the clinician may select a suitably dimensioned implant 200 .
- the implant is then placed between the prongs 132 , 134 located on the distal end 124 of inserter 100 .
- the prongs 132 , 134 are then compressed by rotating the sleeve 112 via grip 114 to securely engage the implant 200 , as described above.
- the clinician may insert the implant 200 into the disc space 12 by passing the inserter 100 through the operative corridor 402 of the retractor 400 .
- the clinician may take several fluoroscopic pictures to determine the location of the implant 200 within the disc space 12 by observing the location of the distal end 124 of the inserter 100 , and in particular the set of prongs 132 , 134 .
- angled inserter 100 may be used to insert implant 200 into disc space 12 .
- straight inserter 300 may be used to insert implant 200 into disc space 12 at a 90-degree rotated orientation.
- the clinician may then rotate the implant 200 to obtain the desired special relationship, as shown in FIG. 23B .
- the clinician may release the implant 200 by rotating the sleeve 112 via the grip 114 counter-clockwise to decompress the set of prongs 132 , 134 .
- FIG. 24 illustrates the use of a straight tamp 430 to guide the implant 200 to the desired position.
- FIG. 25 illustrates the use of a footed tamp 440 used to insert and compress autograft or other fusion-promoting composition (such as bone morphogenic protein) 442 in the disc space 12 .
- 26 depicts the final positioning of the implant 200 and the allograft material 442 at the close of the procedure according to the present invention.
- the clinician may remove any distraction means prior to the removal of the inserter 100 so the vertebral endplates of the vertebrae 10 , 20 engage with the teeth 112 on the top 210 and bottom 220 of implant 200 . Thereafter, the inserter 100 may be withdrawn, the annulotomy closed, the retractor 400 removed, and the incision closed.
- the exemplary inserter 100 may be modified to handle implants having widths other than 9 and 11 mm. It is contemplated that spinal implants according to the present invention may have any width suitable for use in an intradiscal space. By way of example only, 14 mm wide implant inserter may be used in accordance with the present invention to insert a 14 mm wide spinal implant.
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- Orthopedic Medicine & Surgery (AREA)
- Transplantation (AREA)
- Neurology (AREA)
- Heart & Thoracic Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
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Abstract
Description
Claims (17)
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US10/887,542 US7905886B1 (en) | 2003-07-07 | 2004-07-07 | System and methods for performing transforaminal lumbar interbody fusion |
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US48555903P | 2003-07-07 | 2003-07-07 | |
US10/887,542 US7905886B1 (en) | 2003-07-07 | 2004-07-07 | System and methods for performing transforaminal lumbar interbody fusion |
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